Heavyweight drill pipe, also known as HWDP, is mostly used between drill collars and the drill pipe to prevent any damage to the drill pipe in vertical drilling industries. A heavyweight drill pipe could also be used to make a transition between the drill collars and drill pipe. It is manufactured by drill pipes manufacturers.
Heavyweight drill pipe has a structure that is made of center upset, which is also k own as wear pad. Its main function is to increase tube life by protecting the tube from wearing on the outer diameter. It does so by keeping it away from the hole wall.
Also, it reduces hole drag and differential sticking problems. The heavyweight drill pipe’s walls thicker and have longer upsets compared to the conventional drill pipe. It is also stronger than the conventional drill pipe.
Uses of Heavyweight Drill Pipe
Heavyweight drill pipe is mostly used between drill collars and the drill pipe to prevent damage to the drill pipe in vertical drilling industries. Another application of heavyweight drill pipes is that they are also used in the horizontal directional drilling for adding some more strength in high-stress situations.
Another utility of these drill pipes is that it is used for the transition between the drill collars and drill pipe. Its main task is to provide a flexible transition between the drill collars and the drill pipe.
The heavyweight drill pipe is best used for directional drilling. This is because it can bend easily. Thus it simplifies directional controls and minimizes connection problems, which usually occurs in high angle drilling without heavy weight drill pipe.
Various combinations of heavyweight drill pipe, with drill collars and standard drill components, can be created to overcome any drilling difficulties. For extending the reach of drill pipe in horizontal wells, specifically in wells with low total vertical depth to total measured depth ratio is low. It is also used sometimes to apply the weight on the bit.